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Why, oh, why do people like the government’s chief scientific adviser Sir Mark Walport, who really don’t understand the basic science, go on about ‘acid’ oceans? Such a condition is well nigh impossible in the real world.
The oceans are PERMANENTLY buffered to maintain pH fluctuating between around 7.6 and 8.2 (this means they are always slightly alkaline; pH7 is neutral)
- The oceans are always saturated with CO2. There is liquid CO2 in the deep ocean trenches (that is the chemical definition of a saturated solution by the way). Surface layers tend to fluctuate a bit more due to their ‘restless’ condition. The warmer the oceans become the LESS CO2 they can hold.
- The oceans could only ever become acidic, that is have a pH of less than 7, IF the earth were to run out of rocks.